What are the latest details?

According to ABC News sources, investigators in the Las Vegas shooting believe that Paddock removed the hard drive of his computer before turning the gun on himself and committing suicide.

The sources added that Paddock purchased software designed to wipe hard drives clean.

The hard drive has not been recovered.

ABC noted that if Paddock's missing hard drive does contain information pertinent to the shooting, Paddock is "not the first mass shooter to destroy or hide digital clues."

Investigators are still attempting to pin down a motive for Paddock's shooting massacre — now considered the deadliest mass shooting in modern U.S. history — which claimed the lives of nearly 60 people, and injured nearly 500 more at a country music festival outside the hotel.